Submission #1123289

#	Time	Username	Problem	Language	Result	Execution time	Memory
1123289		heey	Balloons (CEOI11_bal)	C++20	10 / 100	120 ms	5004 KiB

bal

#include<bits/stdc++.h>
#define f first
#define s second
#define all(x) (x).begin(), (x).end()
#define mod 1'000'000'007
#define inf 1'000'000'000'000'00
#define pb push_back
#define vvi vector<vi>
#define fst ios_base::sync_with_stdio(0);cin.tie(0);
using namespace std;

int x[200005], r[200005];

signed main(){
	fst
	int n; cin >> n;
	for(int i = 0; i < n; i++){
		cin >> x[i] >> r[i];
	}


	vector<double> ans(n);
	int mx = 1;
	int px = 0;
	for(int i = 0; i < n-1; i++){
		ans[i] = r[i];
		if(i != 0){
			ans[i] = min(ans[i], (double)(x[i] - px)*(x[i] - px)/(4*mx));

			int d = x[i+1] - x[i];
			if((double)d*d/(4*ans[i]) < (double)(x[i+1]-px)*(x[i+1]-px)/(4*mx)){
				mx = ans[i];
				px = x[i];
			}
		}
		else{
			px = x[i];
			mx = ans[i];
		}
		
	}
	ans[n-1] = min((double)r[n-1], (double)(x[n-1]-px)*(x[n-1]-px)/(4*mx));

	cout << fixed << setprecision(3);
	for(int i = 0; i < n; i++) cout << ans[i] << '\n';
}

• Subtask 1: 0 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10